package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.Annoation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

import static com.sky.constant.PasswordConstant.DEFAULT_PASSWORD;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    @Override
    public void save(EmployeeDTO employeeDTO) {
        //类型转换
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);//把已经有的属性拷贝
        employee.setPassword(DigestUtils.md5DigestAsHex(DEFAULT_PASSWORD.getBytes()));//传输密码并加密
        employee.setStatus(StatusConstant.ENABLE);//启用
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        //TODO 这里还没有办法获取员工 先写固定值

//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        BaseContext.removeCurrentId();

        //调用mapper层
        employeeMapper.save(employee);
    }

    /*
    * 分页查询
    * */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> pageResult=employeeMapper.page(employeePageQueryDTO);

        //返回记录数
        long total = pageResult.getTotal();
        List<Employee> records = pageResult.getResult();

        return new PageResult(total,records);

    }

    /*
    业务逻辑

    * */
    @AutoFill(OperationType.UPDATE)
    @Override
    public void updateStatus(Integer status, long id) {
        //在这里用动态更新使得更新更加通用
     Employee employee = Employee.builder()
                .status(status)
                .id(id).build();
        employeeMapper.updataStatus(employee);
    }

    @Override
    public Employee select(Long id) {
        Employee employee= employeeMapper.select(id);
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeedto) {
        employeeMapper.update(employeedto);
    }

}
